Fix failure to render presentation

Author: kgryte

lib/node_modules/@stdlib/repl/presentation/bin/cli

@@ -42,7 +42,7 @@ function main() {
 	var opts1;
 	var opts2;
 	var repl;
-	var pres; // eslint-disable-line no-unused-vars
+	var pres;
 	var args;
 	var cli;
 
@@ -125,6 +125,9 @@ function main() {
 
 	// Create a new REPL presentation:
 	pres = new Presentation( repl, opts2 );
+
+	// Render the first slide:
+	pres.show();
 }
 
 main();